RT Journal Article SR Electronic T1 Is there a learning effect on 1-minute sit-to-stand test on post-COVID-19 patients? JF ERJ Open Research JO erjor FD European Respiratory Society SP 00189-2022 DO 10.1183/23120541.00189-2022 A1 Ana Sevillano-Castaño A1 Renata Peroy-Badal A1 Rodrigo Torres-Castro A1 Elena Gimeno-Santos A1 Pablo García Fernández A1 Cristina Garcia Vila A1 Aranzazú Ariza Alfaro A1 Rosalia De Dios Álvarez A1 Jordi Vilaró A1 Isabel Blanco YR 2022 UL http://openres.ersjournals.com/content/early/2022/06/30/23120541.00189-2022.abstract AB Background In field tests, clinical guidelines recommend performing two tests due to the learning effect; however, in the 1-minute sit-to-stand test (1min-STST) it is not clear that this effect exists.Objective To determine the learning effect of the 1min-STST in post-COVID-19 patients.Methods A cross-sectional study was conducted in patients recovering from COVID-19 pneumonia, older than 18 years. The 1min-STST was performed twice with a difference of 30 min. The intraclass correlation coefficient (ICC) was used to assess the learning effect and the Bland-Altman plot was used to evaluate agreement between both tests.Results Forty-two patients were included (mean age 53.8±10.3 years; 52% female). Twenty-nine patients were hospitalised with a median of 15 (4–27) days. Only seven patients required ICU admission. The median of repetitions in the 1min-STST was 22 (19–25.3) and 22.5 (20–25) in the first and second tests, without significant differences. None of the physiological variables evaluated showed a significant difference between both tests. We found an ICC of 0.984 (IC95 0.971–0.992). Bland-Altman analysis showed a bias of −0.38 for the test-retest measurement error.Conclusion The 1min-STST is a repeatable test without differences between the first and second tests. A single test is necessary to assess exercise tolerance in post-COVID-19 patients with this field test.FootnotesThis manuscript has recently been accepted for publication in the ERJ Open Research. It is published here in its accepted form prior to copyediting and typesetting by our production team. After these production processes are complete and the authors have approved the resulting proofs, the article will move to the latest issue of the ERJOR online. Please open or download the PDF to view this article.Conflict of interests: The authors declare to have no conflict of interest.